Perhaps you should try some spelling variations:
"senales estudios hispanic." » "senales estudios hispanicos.", "senales estudios hispano.", "senales studies hispanic.", "senales estudio hispanic.", "reales estudios hispanic.", "sociales estudios hispanic."
"series estudio urbano." » "series estudios urbano.", "serie estudio urbano.", "serie estudios urbano.", "series estudios urbanos."
"series espacio urbano." » "series spain urbano.", "versus espacio urbano.", "sociales espacio urbano.", "series espacio urbanismo."

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("series estudio urbano.") or ("series espacio urbano."))) or ("senales estudios hispanic."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("series estudio urbano.") OR ("series espacio urbano."))) OR ("senales estudios hispanic.")).
• Removing quotes may allow a broader search: (((( series estudio urbano. ) or ( series espacio urbano. ))) or ( senales estudios hispanic. )).
• Adding a wildcard symbol may retrieve word variants: (((("series estudio urbano.") or ("series espacio urbano."))) or ("senales estudios hispanic."))*.